Replace sun.misc.Unsafe with jdk.internal.misc.Unsafe Reviewed-by: chegar, kvn
Adds c1 & c2 x86 intrinsics for j.l.Runtime.onSpinWait() that utilize the PAUSE instruction Co-authored-by: Yuri Gaevsky <ygaevsky@azul.com> Reviewed-by: iveresov, kvn